Dentifrice



Y PATENT OFFICE.

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This invention relates to a denti frice, and the present is in plart a continuation of application Serial 0. 7 34,513, filed August 27. 1924.

l The object of the invention is to rovide a' ll pable of wearing away the enamel of the teeth, and no ingredient capable of exerting a solvent action thereon.

A corolla function of a complete dentifrice is to issolve and completely remove 9 oils, fats, and mucinfrom the teeth; thus reventing the formation of tartar and other seposits, and exposing the actual surface of the teeth to direct contact of the cleans ng instrument to secure a thorough cleansing thereof.

A still further desirable property of a dentifrice-is to be capable of exerting a mild antiseptic action, thus retarding the increase of bacteria within the oral cavity without in'uring the tissues of the mouth or gums.

e dentifrice of the meets these requirements y the incorporation therein of a substance which acts as a solvent of fats, oils, and mucin; and which 38 has a mild antimptic efiect, without 1n uring the teeth or tissues or imparing the flow 0r alkalinity of the saliva. v

One substance having these desirable r0 rties for use in a dentifrice is the I 40 alide of methane, carbon tetrachlori e or tetrachlor methane (CCL).

As used in a dental cream. this active inient is combined with relatively inert substances which provide filling material.

I .The following formula, involving carbon tetrachloride is one which has been found to give satisfactory results: 7

Calcium carbonate (prepared chalk) Grams.

1}. Magnesium carbonate Tetra-chlor-methane -40 White mineral oil (hi hly refined petroleum oil of the lubricating Oi of anise 5 resent invention poses of the dentifrice.

and this applioa- Grams. EucalyptoLua 2-3 Mentho 1 Sodium chloride 2-3 Soap 10 so Glycerme 145 Water- 145 It should be understood that the formula given above is illustrative only, and that the ingredients other than the carbon tetrachlori e may be varied in order to provide a dental cream of any desired consistenc and flavor. The amount of carbon tetrach oride may also be varied, and as this substance is harmless, it may be included in as great an amount as will remain in a uniform mechanical mixture with the other ingredients of the composition. There is also no definite lower limit to the amount of this substance wh ch may be used, as an a preciable quantity will exert a hen cia effect. In order that the most advantageous results may be obtained, however, it is desirable that the amount of carbon tetrachloride in the composition should be from one-twentieth ofthe total weight of the composition to an amount as great as may be retained in satisfactory condition therein.

Other halides of methone itself may be used instead of the carbon tetrachloride, and halides of the other members of the series mag also be substituted therefor.

f the other halides of methane, di-iodo methane may be used in the com osition if so desired. Of the tri-halides o methane, chloroform may be used,v but bromoform (CH Br,) and iodoform, as commercially avaliable, have too netratin and unpleasantly pungent an or to ren er their use in a dentifrice desirable. Althou h chloroform may be used, its high rate 0 evaporation renders it a less desirable ingredient than carbon tetrachloride. It should be understood that in this connection the chloroform is included for its solvent and cleansin properties. Its antiseptic action is onl o secondary importance, while its anmst etic properties are wholly foreign to the pur- .105 Of the tetrahalides of methane, tetrachlor methane has been given above as the substance of greatest general suitability, because of its ph sical properties and ready availability. 0 the other tetrahalides, carbon tetrabromide (CBr,) and carbon tetraiodide (G1,), the tetraiodide p ph sical roperties which render its use possi 1e and esirable in a dentifrice.

Of the halides of the higher members of the parafiin series various members may also be advantageousl untilized. Not only the monohalides of t e parafiin series, but also the di-halides and poly-halides of the series may be emplo ed when their physical prop erties render them suitable for use in a dentifrice.

' The halogen substitution products of several of the ethylene series of hydrocarbons may also be used instead of carbon tetrachloride in a dentifrice. Of these the most suitable members are ethylene chloride (C,H Cl,) and methylene chloride (C,H,Cl,) A number of the halides of the acetylene series also possess suitable characteristics.

It should be understood that a number of the halides of both the saturated and unsaturated series, which have physical roperties renderin them suitable, are re atively so rare that t eir use in a dentifrice is rendered commercially im ractical.

. It should also be un erstood thatodor, or taste, as well as boiling point, is of impor- ,tance-in considering the desirability of any compound from the view point of'its physical properties. Thus many of the bromides have such a. penertating 'and disagreeable odor that their use is in effect precluded by .point between twenty-five de .mula for which is chloride and the i0 idle may be included.

the impossibility of using flavoring matter which will cover or neutralize the same.

While the specific gfavities of the substances vary considera ly, it ma be stated generally of all of them that t e best results are obtainedby using an amount in excess of one-twentieth by weight of the total com osition.

A hali e which presents many desirable characteristics is ethyl iodide C,H,I). This substance corres nds rather c osely to .the carbon tetrach oride, but exerts a sli htly greater antiseptic effect.

fn regard to any of these substances, it

may be stated as a general. principle that In such case, it may be economical to use a greater proportion of the chloride; for example to include thirty grams of the chloride and ten grams of the iodide.

A satisfactory procedure inv making the dental cream consists in mixing the white mineral oil and the liquid halide. They may then be added to the solid constituents of the dentifrice, such as calcium carbonate and ma esium carbonate, which absorb them. be other constituents such as glycerlne, soap solution, and water, to which the flavoring matter may have been previously added,,are then added to the solid constituents, with the absorbed ingredients, to produce a dentifrice having a pasty consistency.

In addition to the dental cream, one or more halogen substitution products of hydrocarbons may be used in liquid form to secure an occasional thorou h cleansing of the teeth. One such liqui may consist merely of a mixture of tetrachlor methane and ethyl iodide. To such mixture, the white mineral oil may be added, if so desired, to retard evaporation of these volatile liquids. A satisfactory formula for such liquid may be given as follows:

Grams.

Tetrachlor methane 3 Ethyl iodide 1 White mineral oil 4 be satisfactorily used as a carrier for the or anic, halide.

't should be understood that the scope of the invention isnot to be limited to specific substances or pro ortions given above, but that the general isclosure contained here-.

in is to be construed as restricted only by the limitations contained in H0 pended hereto.

What I claim is:

. 1. A dentifrice comprising carbon tetrachloride as its principal active ingredient.

2. A dentifrice comprisi as its chief acl tive ingredient and as a so vent of organic matter a halide of an aliphatic hydrocarbon having its boiling point between the limits of twenty-five degrees centrigrade and one hundred fifty degrees centigrade,

3. A dentifrice comprisin as its chief active ingredient and as a so vent of organic matter a chloride of an aliphatic hydrocarbon having its boiling oint between the limits of twenty-five egrees centi ade and one hundred fifty degrees centigra e.

4. A dental cream comprisin carbon tetrachloride, filling material, an a white mineral oil.

5. A dental cream comprising as its chief the claims apactive ingredient and as a solvent of organic matter a halide of an aliphatic hydrocarbon of twenty-five degrees centigrade and one hundred fifty degrees centigrade in an amount constituting no less than one-twentieth by weight of the total composition.

8. A dentifrice comprising as its chief active ingredient and as a solvent of organic matter a chloride of an aliphatic hydrocar bon having its boiling point between the' limits of twenty-five degrees centigrade and one hundred fifty degrees centigrade in an amount constituting no less than one-twentieth by weight of the total composition.

9. A dental cream comprising carbon tetrachloride in an amount no less than onetwent-ieth by weight or the total compositign, filling material, and a white mineral o1 10. A dental cream comprising as its chief active ingredient and as a solvent of organic matter a halide of an aliphatic hydrocarbon having its boiling point between the limits of twenty-five degrees centigrade and one hundred fifty degrees centigrade in an amount no less than one-twentieth by weight of the total composition, filling material, and

a white mineral oil.

11. A dental cream comprising as a solvent of organic matter a chloride of an aliphatic hydrocarbon having its boiling range between the limits of twenty-five degrees centigrade and one hundred fifty degrees centigrade, in an amount no less than one-twentieth by weight of the total composition, filling material and a white mineral oil.

oleaginous carrier for the carbon -tetrachloride.

'12. A dental preparation comprising car-- bon tetrachloride as an active agent, and an 13. A' dental reparation comprising carbon tetrachlori e as an active agent, and a white mineral oil as a carrier for the carbon tetrachloride.

14. A dentifrice comprising as its chief active ingredient and as a solvent of. organic matter a halide of an aliphatic hydrocarbon which is liquid at room temperature and atmospheric pressure.

15. A dentifrice comprising as its -chief active ingredient and as a solvent of organic matter a chloride of an aliphatic hydrocer bon which is liquid at room temperature and atmospheric pressure.

16. A dental cream comprising as its chief active ingredient and as a solvent of organic. matter a halide of an aliphatic hydrocarbon which is liquid at room temperature and atmospheric ressure, filling materialfand a white minera oil;

17. A dentifrice comprising as its chief:

active ingredient and as a solvent of organic matter a halide of an aliphatic hydrocarbon which is liquid at room tem rature and atmospheric pressure, said hali e being present in an amount no less than onetwentieth by weight of the total composition.

matter a chloride of an aliphatic hydrocarbon which is liquid at room temperature and atmospheric pressure, said chloride being present in an amount no less than onedentifrice comprising as its chief active ingredient and as a solventof organic" which is liquid atroom temperature and atmospheric pressure, in an amount no less than one-twentieth by weight of the total composition.

20. A dental cream comprising as its chief active ingredient and as .a solvent of organic matter a chloride of an aliphatic hydrocarbon which is liquid at room temperature and atmospheric pressure, in an amount no less than one-twentieth by weight of the total composition, filling material, and a white mineral oil.

In witness whereof, I hereunto set my hand.

ROY H. BROWNLEE. 

